Drugmaker GlaxoSmithKline said on Tuesday it would bring more jobs to Britain, taking advantage of tax changes and delivering good news in an economy where recovery remains fragile. "We expect over the next several years to be increasing our activity in the UK," Chief Executive Andrew Witty told reporters after the group released its second-quarter earnings on Tuesday. "I would fully expect us to have a more substantial degree of activity, and therefore have greater potential to pay tax, in the UK, not least because things like the patent box and the reduction in corporation tax have started to make the UK more attractive."